It depends. Since I’m championing my 2s (aside from bagman) pretty much every 2* cover will be useful either to add to my champ, or provide sorely needed iso to continue the champ cycle.
since there is no health packs in the iso vault, I find every item in it rather useful.
I hate vaults. You just get to see exactly what you won’t pull, and exactly which 2* you will pull. I’d rather be surprised when I get violated… it’s so much worse when you know its coming.
My vault luck sucks.
I pulled 49 Taco Tokens… 1 4* which was 1000 HP… and 35 health packs.
Did not have nearly as much luck as with the Naughty or Nice vault. Best pull was a Scarlet Witch cover, which let me champion her. That turned into Thing 
. I’m out of progression tokens and daily deals, so that’ll be all for me.
Normally I don’t have much luck with single token pulls from the vaults, but this time 1 token got me the Jean Grey cover. Wish I had played the lottery too.
After finishing unstable iso 8 I decided to throw 100hp away on the vault as a parting gift. It gave me the legendary token… so there’s that at least. If it had been the cover pack instead of the vault, there wouldn’t even be a legendary token in there.
That the token gave me Mr Fantastic is neither here nor there…